Can't have a task externally triggered with a PXI backplane start trigger?

[crelf]

I've got a PXI-6534 that's acquiring data from an external trigger on PFI2 - that works beautifully: no problems there.  the issue arises when I want to start this acquisition using a trigger from the PXI backplane (PXI_Trig0) which is routed programmatically from a PXI-6281 - when setting up this task in MAX, I can only do one or the other (ie: externally trigger acquisition points from PFI2 or start acquisition from PXI_Trig0) but not both.  If I try to do this, I get error -215006 (which has no description).  Has anyone got any ideas?

[Raajit_Lall]

Hello,

Could you please elaborate a little on why you are trying to use two triggers? Are you using both as start triggers? Also, some pins cannot use some of the triggers. You can find exactly which pins use which triggers in the help file for the 6534.

Regards,

Raajit L

[crelf]

I am acquiring data triggered by a modified rotary encoder - I would like to start my acquisition on a Z pulse and then acquire points at every A pulse.  The A pulse is wired into the same card as the data coming from the encoder, but the Z pulse is wired into another DAQ card (don't ask why - it just has to be this way - trust me).  I can start an acquisition off the Z pulse that is clocked internally off the card - that works, I can software start an acquisition that is timed of te A pusle - that works, but I can't start an acquisition off the Z pulse and is timed off the A pulse - that's when I get the error with no description.  Can you please tell me what the error code means?

[Raajit_Lall]

Hi,

Do you also get this error if you try to route your PXI_Trig0 line to a PFI line? You can achieve this using the DAQmx Connect Terminals function and routing your PXI Trigger line to a PFI line. Now, both your triggers will be on PFI lines. Could you please try this and see if it still gives the same error. This error is a rare one, so we do not have too much information on it currently. I am trying to reproduce it on my end.

Regards,

Raajit L

[Louis_Manfredi]

Did anyone ever figure out what error -215006 means? 

I'm trying to trigger output on a PXI 6534 off of the start trigger on a PXI 6133, and I'm getting the same message.

Might save me some hassle in troubleshooting if I knew what the error meant.

Best Regards, Louis

[crelf]

I gave up 😞  I ended up just starting the acquisition on the Z pulse and the sampling faster than the phenomena and filtering repeat values in software.  Not at all an elegant solution, but it worked.  I still have no idea what that error code means - sorry.

[Louis_Manfredi]

Hi Christopher:

Thanks for the info, I'm going to try a work-around too-- in my case I think I'll be lucky enough to have a graceful work-around-- perhaps even the way I should have done it in the first place. 

Seems a little odd that you first raised the issue back in February of 2007, and still no accessible documentation of what the error message means.  But that isn't your or my Bailiwick, is it?

Best Regards, Louis